#1177EF
Closest named color: Cerulean Blue (#056EEE). oklch(58.6% 0.2 257), rgb(17, 119, 239).
Aa
Black text reads best on this color (4.90:1).
About this color
#1177EF is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.200 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.023 away. Black text reads best on it, at 4.90:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.200) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.90:1 |
| White text | 4.27:1 |
Values
| HEX | #1177EF |
| RGB | rgb(17, 119, 239) |
| HSL | hsl(212, 87%, 50%) |
| OKLCH | oklch(58.6% 0.2 257) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #1177EF | 4.27:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #1177EF | 4.90:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #1177EF text on white | 4.27:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #1177EF text on black | 4.90:1 | AA | Lc -32.8 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFB
oklch(88.5% 0.05 257.7)
-
Step 300
300
#9CC3FB
oklch(80.9% 0.09 257.4)
-
Step 400
400
#63A2F9
oklch(70.8% 0.144 256.8)
-
Step 500
500
#3487F6
oklch(63.1% 0.184 257.1)
-
Step 600
600 (this color)
#1177EF
oklch(58.6% 0.2 257)
-
Step 700
700
#005CC0
oklch(49.1% 0.174 256.9)
-
Step 800
800
#004B9F
oklch(42.7% 0.151 256.9)
-
Step 900
900
#0D3F7F
oklch(37.6% 0.12 257.1)
-
Step 950
950
#0A264B
oklch(27.1% 0.076 256.8)
#1177EF with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #2584F3 | 0.036 |
| Deuteranopia (no green cones) | #0071ED | 0.017 |
| Tritanopia (no blue cones) | #0095A8 | 0.151 |
| Achromatopsia (no color) | #7A7A7A | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1177EF
#1177EF
oklch(58.6% 0.2 257)
- #A47100
#A47100
oklch(58.6% 0.123 77.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #1177EF, closest first.
No curated palette has a color within ΔE 0.04 of #1177EF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.023
- Clear Blue #247AFD ΔE 0.024
- Royal Blue #4169E1 ΔE 0.043
- Bright Blue #0165FC ΔE 0.049
- Neon Blue #4361EE ΔE 0.055
- Azul #1D5DEC ΔE 0.062
- Dodger Blue #1E90FF ΔE 0.068
- Water Blue #0E87CC ΔE 0.074
Use #1177EF in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.